Man pages matching name tap::parser::sourcehandler::handle in section 3pm:

TAP::Parser::SourceHandler::Handle.3pm.en	debian 10 / libtest-harness-perl
TAP::Parser::SourceHandler::Handle.3pm.en	debian 11 / libtest-harness-perl
TAP::Parser::SourceHandler::Handle.3pm.en	debian 12 / libtest-harness-perl